Drag-saw



Enuenfm W.

5 SHEETS-SHEET 1- Patented Apr. 27, 1909.

(Brennan .31) AUG. 14,1908.

D. J. SHEA.

DRAG SAW.

APPLICATION I'].

Q QNN 1 D. J. SHEA.

DRAG SAW.

APPLICATION FILED AUG.14,1D08. 919,389. Patented Apr. 27, 1909.

if J36 49 16d? 44 5 SHEET8-SHEBT 2.

D. J. SHEA.

- DRAG SAW. I APPLIOATION TILED AUG. 14,1908.

9 1 9, 389 Patented Apr. 27, 1909.

5 SHEETS-SHEET 3.

Elnuenfoz ja zidjim ano'pnugo Patented Apr. 27, 1909.

- 5 SHEETS-SHEET 4.

attain D. J. SHEA.

DRAG SAW.

nrmonnm rmnn AUG. u, 190% 9 1 9,389. Patentad Apr. 27, 1909 that may bereadily trans DAVID JOSEPH SHEA, OF MARIANNA, ARKANSAS.

DRAG-SAW Specification of Letters Patent.

Patented April 27. 1909.

Application filed; August 14.1908. Serial No. 448,577.

T 0 all whom it may concern:

Be it known that 1, DAVID J. SHEA, a citizen of the United States,residing at lliarianna, in'the county of Lee and State of Arkansas, haveinvented a new and useful Drag- Saw, of which the following is aspecification.

This invention relates to drag saws and has for its principalv object toprovide a machine orted from place to place and adjusted fort e purpose0 .cut- .ting logs placedin different positions.

A further object of the invention isto pro vide an improved means forholding and clamping the saw and for guiding the saw while at work.

A still further object of the invention is to provide a novel form ofsaw actuating means fund to so arrange the mechanism that the movementof the saw may be readily stopped without stopping the operation of themotor mechanism.

A still further object of the invention is to provide an improved meansfor controlling the connections between the motor and the saw and thetraction wheels of the device so that the motor may be connected to ordis;

connected from the saw and-its. power util-v ized iorpropelling themechanism as a whole from "lace t,oplace.

Wit these and other objects-in view, as Will'mOIG fully hereinafter-apear; the invention consists m'certain nove features of construction--and arrangement of parts, hereinafterffully described illustrated inthe accompanying drawings, and particularly pointed outin the appendedclalms, it being understood-that various changes in the form,proportions, sizeand minor details of the structore-may be made withoutdeparting from the spiritiorsacrificing any of the advantages of-theinvention.

v In. the accompanying drawings Figure 1 18 8 plan view of a drag sawconstructed in accordance-with the invention. Fig. 2 is a side elevationof the same. Fig. 3 is a transv'ersc'section of the machine on the line3-3 of Fig.';2. Fig- 4 is a longitudinal section view on the line 44of'Fig. 1. Fig. 5 is a similar view on the line 55 of Fig. 1. Fig.

6 is a longitudinal sectional .view' on the line (S 6 of Fig. 1, showingpri'nei ally the mechamsm for adjusting theend races. Fig. 7

is a'plan view partly in the nature of a dia gram, illustrating the sawreciprocating mechanism. Fig.8 is a longitudinal section showing drumand lever of steering device. Fig. 9 is a detail cross section of thechain operatin hollow lever. Fig. I0 is a ers ective o the handoperating end'of tl iejc. din '0 erating hollow lever. Fig. 11 is aper'spec tive of the frame and support forsaw carrying mechanism. Fig.12 1s a detail view of a preferred construction of driving chain.

Similar numerals of reference are employed to indicate correspondingparts throughout the several figures of the drawings.

The work'ng parts of the machine are sup,- ported b a substantiallyrectangular framework ich, in the present instance is formed of'aplurality of longitudinally disposed, bars 10, 11, 12, and '13 whichareconnected at the ends by transverse bars 14, 15, any suitable numberof cross braces being em loyed for strengthening purposes.

he machine is designed to travel by its own powerfromlaceto place, andfor this purpose is provi ed with a pair of carrying wheels 17 that aresecured to an axle 18, while at the front-of the machine is a smallerwheel 19. carried by a steering fork 20 which may be turned for thepurpose of guiding the course of the rnachine. The steering fork iscarried by a verticall disposed 'bar'21' at the head of which is asheave 22-that is; connected to a-seg'ment'23 byatiller ropef24. Thesegment is provided with an operati lever 25 that carriesa latch belt oftheordi nary construction which may he moved'int'o and from engagementwith a locking quad:- rant withv a locking quadrant 26 on the bar 12.

The frame of the machine carries a motor 30 preferably hustion engineand the main shaft of the motor is connected to a counter-shaftBl meansof a belt .32. From this countcre shaft motion is imparted toall of theoperav ing parts of the machine and the-comma tions are controlledin'the mannerjmore-specifically pointed out hereinafter. I Thelfroni bar13 of-the frame carries a pair of spaced Z-bars 5 which are designed-forthe remap-- tion .of a longitudinally movable slide 36 which in thepresent instanceis formed-of a lon thin plate reinforced at each edge byang bars as shown in Fig. 3. Extending from the slide is a pivot pin 37on which is mounted a plate 38, and therear'wall ofan in the form .of-aninternal oom'-' is mounted a bracket 41.

open frame 39, the latter being of substantially rectangular form andbeing provided at its front end with a pivot pin 40 on which In practicethe plate 38 and the bracket 41 are free to tilt on their alining pivotsfor the purpose, as will subsequently appear, of adjusting the saw todifferent angular positions, while the central 0 en frame 39 remainsstationary so far as tilting movement is concerned, the frame, ofcourse, being carried by the slide as the latter is reciprocated duringthe operation of the machine.

Arranged in front and parallel with the bar 13 of the frame is a shaft$3, the ends of which are mounted in hearings formed in the the slide.vnonc1rcular form in cross section at that end forwardly projecting endsof the frame bars l-tand 15, and auxiliary hearings are also rovided forthe shaft, one of the bearings sing in the form of a block a l thatprojects from the front frame bar 13 and straddles The shaft is ofsquare or other adjacent the saw and extends through a similar shapedopening formed in a wind mg drum 47. The ends or hub members of thisdrum extend through openings formed in the open fra1ne'39 so thatthedrum is free to rotate when turned by the shaft and will move endwise onthe shaft as the'slide is reciprocated.

The shaft 43 is used for the purpose of adjusting the vertical positionof the saw and 'i-tis manipulated by a lever 49 fulcrumed loosely on theshaft and provided with a pawl that engages a ratchet wheel 50 rigid onthe shaft. Also by turning this lever the saw may beforced down to itswork under greater or less pressure as desired. .After the ratchet wheelhas been turned to the desired extent it is held in place by a lockingpawl 51 that is pivoted to the-upper edge of the frame bar 13..

Returning now to the saw carryingmecln Ianism proper 52 indicates aframe that is connected to the bracket 41 by a transversely disposedpivot pin 53, the pin 53 having its axis at a right angle to the axes ofthe pivot pins 37and 40 so that the frame 52 is practically mounted foruniversal adjustment.

50 The frame is in the form of a channel bar the side Webs of which areprovided with, outwardly directed flanges 56 and these serve for thereception -'of a vertically movable slide 57. The slide is connected attop and bottom to a cord or chain 58 that extends l s ectively.

'rangedto engage in any one of a series of locking notches that areformed 1n one ofthe side flanges 60, so that the slide may be readilymoved in the direction of the length of the frame and then looked inadjusted position. The sheave 62 carried by this slide extends over arope or chain 58 and its function is to maintain the chain or rope intaut condition.

In order to adjust the frame 52 on the pivot pin 53 the upper portion ofthe frame is connected to the top of the late 38 by means of a bracethat is formed 0 two sections 6.6 and 67 and both sections are pivotallyconnected at their outer ends to the plate and frame re- One of thesesections is provided with a pin 68 and the other with a series ofnotches 69 so that the length of the brace may be adjusted and the bracethen locked in adjusted position. This permits tilting of the frame 52so that the latter may be presented to varying angles to the vertical.

Extending from the upper portion of the frame 52 is a pivoted brace bar7 0, the lower end of which is provided with a lurality of notches 71arranged to engage a ocking pin 72 that projects from the bearing block44, and by moving this lever or brace the frame 52 may be turned withthe two pivot pins 37 and 40 as an axis of movement, the frame beingadjusted to any desired angle and then locked in place by engaging thepin 72 in one of the notches 71.

The lowerportion of the slide 57 is provided with an upwardly benttongue 80, and above this tongue the slide carries a shoulder 81, the

shoulder being arranged to engage with the back of the saw 82. The loweredge of the rear end of the saw is notched to fit-over the tongue SO'andat the end of the notches are abrupt shoulders 83 which by engaging withthe side walls of the tongue will revent independent longitudinal play 0the saw.

Pivoted to the slide is a locking plate 85 that is arranged to swingdown over the rear portionvof the saw blade and the edge of the plateenters the s ace between the saw and k the tongue 80 so t at the lattrwill serve to hold the plate in looking position while the saw will beconfined and rigidly held from in dependent movement in any direction.

The mechanism thus iar described will permit the raising and lowering ofthe slide 57 in the frame 52 for the urpose of adjusting the sawvertically, w 'le the frame 52 may be tilted in two directions each at aright angle to each other for the purpose of adj usting the saw to anyangular position.

On the projecting end of the transverse frame bar 15 is a verticallydisposed guide 88 on which is mounted a vertically movable slide 89having a pin 90 that over hangs the bacl; of the saw and which serves asa guide for the saw during its reciprocatory move- 55 movement a latch115 is employed, sait latch ment. The slide is free to move-up and-downin order-rte follow the similar movement of tions respective carries asheave 105.

the saw but inalloaseswill aid in maintaining the saw ma direct :hne.

The inner faces-ofthe two frame bars 12 I and 13 are provided. withlongitudinally extending parallel grooves 93 arranged for the recs.txonbiapmrof slides 94 .and 95. Each of t slides sprovide'd with arecess 96 at afpgiut about midway of its length, and in these recessesarecams 97 that'arc de osed diametrically opposite each other, .as-s ownin Fig. 4, the't-wo shafts being permanently s'ecuredpto thecounter-shafts 31 so that as the latter is rotated the two slides willbe simultaneously relciprocated in opposite direc- .Moun ed on th eslide 95 is a sheave 9S, and

shde 94 is'a.sheave99. Around these two sheaves passes a cable or chain100 havmg" one end permanentlysecured to the bar 12"of the frame at101while the opposite end extends around a sheave 102 carried by the bar 13and its'end is permanently secured to the saw carrying slide 36 at- 103.The slide 95 further carries-a sheav'e 104, and slide 94 Around thesetwo sheaves passes'a cable or chain 106 having one end secured to thebar 12 at 107 while the opposite end of the cable passesaround 108. iiithe frame bar 13, and its end is secured to the saw carrying slide at103'. lt will be noted that the two cables are passed maritime guidingsheaves of the slrdcs' in o posite directions respectively, so that as't e slides are reciproeated the cables willbe so operated as to effectrec-i cable is drawn in one direction the other will slackenedto acorresponding extent in the other direction.

The cams 97 in theslide recesses 96 operate on one side directly againstone wall ofthe the opposite side, is" formed PlYOtQtlOn a stud 1 13 onthe slide.- The plate 111 may be swung into and'out of the recess,

andthe outer-edge ofthe plateisjcrirved to fit against a correspondingcurved w allo f the recesswhile a shoulder 114 is formed'on'the rear ofthe" plate to' abut against a correisponding shoulder in the slide andprevent excessive downward IIIOV elnent of the plate. In order to'lockthe plate against u )wafr'rl I being pivoted within the slide and havingits upperend forced into engagement withrthe Jupperfedge of the plate114 through the medium of a s ring 116'.

On each of t' .e frame bars 12 and 13 is a 'smallfvertllcal bracket 118in which is journaled a shaftl 19- and to each shaft is secured anoperating lever 120 having a latchbolt s provided with a crank pin 7rocator 'movc -ment of thesaw carrying s ide, am. as onev which may beengaged with a stop looking quadrant. The inner end of each shaft 119122 that fits under-a bar 123 that is pivoted between a pair of cars124' rising from the late 114-. The rear end of the bar is provic edwith a downwardly" extending lug or block 125 which strikes against thetop ofthe main slide for the urpose of limiting; downward movement. l hefront endof the bar nornially'rests against the inc-line face 126 of theupper end of the latch 115 and as the crank shaftis turned by itsoperatingilever for the purpose of raising the crank pin 122 the leverwill be swung on its ivot and the forward end. of. the lever will rifleagainst the cam face .1261 forcing; the latch 115 to release position.when the lever 123 has been moved-"to; such position as to release thelatch its latch engaging endwill bind against the top of the plate andas'the upward movement of the crank pin-is then continued the plate willbe lifted with the'pin 113 as a center of moirement and will be liftedout of engagement with the cam so that the latter. is than free torotate idly-without reciprocating the slidd This mechanism is of valuein that. it permits the stoppage of the saw whilethe motor continues torotate. The saw actuat' mg mechanism may beset into operation at anytime by lowering the two plates 111.

On the wheel-axle 18 is a sprocket wheel 130," and arranged to the-rearof the wheel axle is a shaft 131 carrying a large sprocket wheel 132This latter sprocket wheel is formed inte 'ral with or is rigidlysecured a friction-dish 1 33 which when necessary may .be. moved intoengagement with a friction disk 134- on the shaft 18 when it is desiredto run the entire machinebackward on its care rying wheels. The shaft131 is mounted eccentrically in a'pair of sleeves 134 that are journaledinfhan 'ers 135 de ending from the cross bars 11' and 1210f the ranie.To one of thesesleeves is secured a lever'136 carrying a latch boltwhich may be engaged with a locking quadrant 137 so that the sleeves may'be'turnedfor the purpose of moving the friction diskinto' or out ofengagement with each other and locking the lever in adjusted position soas to'hold the .diskfrictionally engaged or in released position.

. Extendin across between the members 1 1:a'nd 1 2 of the frame is astationary shaft .140 on which isi'mounted an idler sprocket 141'. Thecounter shaft 31 carries a sprocket wheel 142 and around'the severalsprocket wheels 130, 132, 141 and 142 passes a link belt 143 which whenthe positionshown in Fig.- 5 enga es the up er portions of two sprocketwhees'13O an( 142 and extends around the sprocket -1-32 and 141, thelower run of the chain being at all times out of engagenrent the, twosprocket wheels 1'30.

ice

and 142. The upperportions of the rims -of the two wheels-130 and 142extend into a slot 150 that is formed in the lower'face of a hollowlever151 and on either side of and forming the Walls of the slot areoppositely disposed approximately horizonta flanges 152 that formsupports for the upper run of the link belt 143 for nearly the entirelength of the latter or at least for that portion of its length whichextends between the two sprocket wheels 130 and 1 12., The forward endof the lever is rovided with a pair of spaced segmental ates 154 whichstraddle the s rocket whee 1411 and which are rovidet with arcuate slots155 through w ich the shaft 140 extends. Pivoted on the shaft 1-10 atopposite'sides of the two plates 1541 is a pair of plates 156 and the uper ends of these plates form ears to WlllCl the upper ends of the lates154 are connected by a pivot" in 157. The two plates 156 are connectecnear the upper 'ahd lower ends by cross bars 158, and the upper crossbar extends into a pair of recesses 159 that are formed in the forwardedges of the segmental plates 154, so as to form a stop to limit theforward. movement of the lever. At the rear end of the chain guidingwheel is a handle 160 that is pivoted on a pin 161 carried by the leverand is free to swing in an ap roximately horizontal plane. The inner encof the lever is' artly inclosed in a small casing 162-that wil preventthe lever swinging too far in one direction, while movement in theopposite direction may be prevented by a pivotallv mounted cam 163 thatis car ried by the lever and is under the control of the operator.Extending fromv the lever is a notched bar 167 which co-acts with aplate 168 that is secured to the frame bar 11;'the

plate 168 has an inwardlyextending flange 169 rovided withnotches withwhich the note es of the bar 167 may interlock so as to hold the leverin adjusted position; and in this connection it may be remarked that thelever has two movements, one a simple vertical swing with the pivot pin157 as a center of movement; andthe other a back and-forth mpvement'in'which the plates 156 swing on the shaft 140 for the purpose of carr ingthe pivot 157 in an arcuate path.

ever is simply moved up the upper run of the chain 143 is raised out ofengagement with the sprocket wheel 130 so that no movement can betransmitted fronr the chain through the sprocket Wheel 134 to thepropelling wheels of the machine, and thus the normal position of theparts when the saw is in operation. Vv'hen, however, the machine is tobe traveled forward the chain is allowed to engage with the sprocketwheel 134 and from thence to axle 18 into the two main propelling orcarrying wheels. When it is desired to back the machine the lever W enthe is raised so as to disengage the chain from the sprocket wheel 134,while the chain still remains in engagement with the sprocket wheel 132and then the lever 136 is m oved for the purpose of forcing the twofrlctional disks 133 and 134 into engagement with each other so'that themachine will be moved backward. When it is desired to throw all of themechanism out of gear and allow the motor to run idly the chain carryingor guiding lever is first raised and then drawn backward so that theplates 156 will be carried rearward, and will thus elevate the pivot pin157 which supports the forward end of the chain carrying lever. Thiswill raise the front end of the lever and the chain will be lifted outof engagement with the sprocket wheel 142 on'the counter-shaft 31 sothat no movement will then be transmittedfrom the counter-shaft to thechain, and the parts may be allowed to remain in this position so as todrive only the saw.

- "At the front cffthe machine is pivoteda plate 180 carrying groundengaging spurs 181 which are adjustably secured to the plate by bolts182. Secured to the plate is a twoarmed lever 183, I the two armsextending above and below the pivot point of the plate and beingconnected to the opposite endscf a cable or chain 18 1 that extendsaround and is secured to a wheel 185', said wheel being ournalecl in abracket 186 on the inner face of the frame bar 13. The' periphery of thewheel is provided with teeth 188 which may be engaged by a pawl on thelever and by manipulating the latter the ground engaging spurs may beforced tightly into the ground or the plate .as a whole may be raised soas to permit free travel of the machine. The lever 187 is provided witha projecting 190 arranged to enter notches for'medin a lever191 that isivoted to the bracket 186. To the rear of t e machine is a second late192 carrying spurs 193 which may a 0 be forced into engagement with theground so that the machine may be firmly braced and held in order toresist movement under the working of the saw.

The supporting Wheels 17 are preferably mounted loosely on their axles,and each is provided with a ring 200 that carries arr-inwardlyprojecting lug 201. Secured to the shaft 'is. a collar or hub 202 havingan outwardly-projecting lug 203 that is arranged to engage with the lug201 for the purpose of transmitting rotative movement to the wheel whenthe vehicle is to be propelled. This construction permits one of thewheels to move slightly in advance of-the other, and is advantageous inturning curves.

lv hat is claimed is 1.' In a drag saw, a main frame, a reciprocatoryslide carried thereby, a saw carrying frame pivotally connected to theslide and [oatory slide carried thereby, a saw clamp, a

frame on which the clamp is slidably mounted, a universal connectionbetween the clamp carrying frame and the slide, and means for lockingsaid clamp carrying frame in adjusted position.

3. In a drag saw, areciprocatory slide, means for supporting the same, aframe having. universal pivotal connection with the slide, means forlocking the frame in adjusted position, a saw clamp carried by theframe, and means for adjusting the clamp in the direction of the lengthof the frame.

4. In a drag saw, a reciprocatory slide, a box frame pivoted thereto, a.bracketpivoted to the box frame, a saw carti ing framepivotallyconnected to the bracket the pivots between the saw frame andthe bracket and between the bracket and box frame being disposed at aright angle to each other, a drum mounted in the box frame, a saw clampslidably mounted on the saw carrying frame, a flexible adjusting devicewound around the drum and connected to the clamp, and an operating shaftextending through the drum and on which said drum is longitudinallymovable.

5. Ina drag saw, a reciprocatory slide, means for supporting the same, abox frame pivoted to the slide, a bracket pivoted to the )0 frame, a sawcarrying frame pivoted to the bracket, a saw clamp slidably mounted onthe saw carr 'ing frame, a drum mounted in the box frame, flexibleconnections between the drum and clamp, and adjustable means for holdingsaid connections taut, and a pair of adjustable bracing members disposedata right angle to each other and serving to connect the saw carr 'ingframe to the slide and to maintain said frame in the position to whichit is adjusted.

6. In apparatus of the class described, a saw carrying clamp having asawreceiving recess provided at oneside with a shoulder and at the-oppositeside with a tongue, a saw notched to fit within therecess, and a movableclamping plate arranged to fitover the saw and maintain the same withinthe recess the edgeof the plate fitting below the edge of the tongue.

7. In a drag saw, a saw carrying slide, a pair of reciprocatoryslidesarranged to move in opposite directions respectively, sheavescarried by the reciprocatory slides, and flexible members extendingaround the sheaves and having one end connected to the saw slide and theopposite end to fixed points.

8. In a drag saw, a pair of cam actuating slides arranged to move inopposite directions respectively, sheaves on the slides, a reciprocatorysaw carrying slide, and flexible" members connected to the saw carryingslide at one end and extending around the several sheaves the oppositeend of the said members being connected to fixed points.

9. In a drag saw, 'a cam shaft, cams thereon, a pair of rcciprocatoryslides through which motion is imparted to the saw said slides beinggrooved for the reception of the cams, and movable plates fitting withinthe recess and adapted to be engaged by the cams said plates beingmovable out of engagement with the cams to stop the transmission ofmovement to the slides.

10. in a drag saw, a frame. a pair of cum a tuatingslidesguided in theframe, cams for actuating the slides, pivot plates carried by the slidesand arranged to be engaged by the cams, latches locking said plates inposition, latch releasing levers pivoted to the plates having operatingcranks arranged to engage said levers to first effect release of thelatches and then to move the plates out of cam engaging position.

H. In a drag saw, a main frame, saw supporting and actuating means uponthe frame, a member mounted for swinging movement upon the frame at oneend thereof, foot plates carried by the member and arranged to engagethe ground to hold the main frame against movement, means carried by theswinging member and extending above and below the same, and meansconnected with the ends of the member for swinging the same into or outof position to so engage with the ground.

12. In a drag saw, a main frame, supporting wheels therefor, sawsupporting and actu-" ating means on the frame, a member supported uponthe frame at one end thereof for swinging movement, foot plates carriedby the member and arranged at their lower ends.

to engage into the ground to hold the main frame against movement, amember fixed upon the swinging member and having portions extendingabove and below the same, a connection secured at each end of themember, and a winding drum about which. the connection is passed, the.said drum being rotatable to exert a pull upon either end of the -memberthrough the medium of the connection and thereby impart swingingmovement to the swinging member whereby to move the plates into or outof position to engage with the ground.

13. In a drag saw, a main wheel frame, pivoted bracing "feet on theframe, a twoarmed lever connected to the feet, flexible membersextending from the lever and means for adjusting said flexible membersto move the feet into or from engagement with the ground.

14,. In 9; drag'saw, a mainframe, a recipromy own, I have hereto amxedmy signature eatery slide supported thereby, a saw clampin the presence01" two witnesses.

ingm'ember carried by the slide means for w 1 ,adju sting saidsawclamping meniber and a DAVlD JODEPH SHEA 5' saw guide mounted on theframe and adjust- Witnesses:

able with. the saw and clamp. -W. W. WORD,

In testimony that I claim the foregoing as BEN B. BONNER.

